Suggest the profile feature for multiple shared.db and local.db

[WantToLearnJapanese]

I want to suggest the profile feature to support multiple forms of shared.db and local.db.

The reason behind this suggestion is to support other PDF readers' annotation and bookmarks.

While in current Sioyek implementation we may be able to write a new table with a newvalue instead of md5 as a value to key(filepath). If the new feature is supported, we may set for example citationKey or ZoteroItemKey as a new value to the path so that we can have Zotero-mode of Sioyek.